Fuel economizer



Aug. 2, F H ROTH v FUEL EGONOMIZER Filed Anz. 25, 1925 2 Sheets-511er??I1 v gfx/vento@ Aug. 2 1927.

F. H. ROTH FUEL ECONMIZER Filed Aufl; 25, 1925 2 Sheets-Sheet 2 rnmnfo'ca? Frank H. REU-L Gufo: m13

Patented Aug. 2, 1927.

UNITED STATES FRANK H. ROTH, F :BAY SHORE, NEW YORK.

FUEL ncoNoiirIznn.

.Application led August 25, 1925. Serial No. 52,457.

The object of the invention is to provide a device for use in connectionwith internal combustion engines, such as those employed for propellingmotor vehicles, so that any unused Jf'uel nding its way past the pistonrings and into the crank case will be returned to the combustion chamberof the engine and utilized, thereby preventing dilution of thelubricating oil and therefore 1ncreasing its period 0f usefulness; toprovide a device which, while returning unused gases,

to the cylinders, will also supply moisture which will tend to keep anycarbon present in a soft state and therefore prevent its adherence tothe cylinder walls and to the valve seats and permit its ejectionthrough the exhaust on the scavenging strokes; and to provide a deviceof this character which may be readily attached to any of the conlUventional forms of motor vehicle engines.

With this object in view, the invention consists in a construction andcombination of parts of which a preferred embodiment is illustrated inthe accompanying drawings, wherein:

Figure 1 is a side elevational view of a well known form of vehiclemotor, showing the invention applied thereto.

Figure 2 is a top plan view of the invention, the connections betweenthe crank case and circulatory system and the dash control beingbrokenaway.

Figure 3 is a vertical sectional `view on the plane indicated by theline 3--3 of Figure 2.

Figure 4 is a lon itudinal vertical sectional view on the p aneindicated by the line 4 4 of Figure 2.

Figure 5 is a central detail sectional view f the connection with theradiator overflow.

Figure 6 is a similar sectional view of the connection with the crankcase breather.

The mixing valve l0 which constitutes the essential element of theinvention is placed in communication with the intake manifold 1l betweenthe carburetor 12 and the inlet valve. It is also placed incommunication with the crank case 14 by a iiexible tubular conductor 15connected with the breather or filling tube 16. Further, it is placed incommunication with the circulatory system by means of a flexibleconductor 17 connected with a radiator overflow 18.

The mixing valve 10 is formed with an outlet 1 19 and the pipe 2Othreadin 1y connected with this leg serves as a, means or CIJ supportingthe valve as well as a conductor effecting communication between it andthe engine cylinders. The preferable means of mounting, where thevehicle em loys a vacuum tank, is to drill and tap t e top 21 of thecarburetor and insert a nipple 22, this nipple connecting with one endof the cross leg of a T 23. The opposite endof the cross leg connectswith the tube 24 leading to the top of the vacuum tank 25, the vacuumtank feeding the carburetor in the usual manner, as by a conductor 26.The pipe 20 at the end remote from the leg 19 connects 'with the lateralleg of the T.

A regulating needle valve 27 is carried by the mixing valve 10 anddisposed in axial coincidence with the outlet channel 28 of the outletle 19, having a seat 29 at the entrance end of t e channel 28. Theproper setting of the needle valve is maintained by a nut 30 threadedupon it and bearing on the machined face of a boss 31 on the mixingvalve.

The connections between the lexible tubes or conductors 15 and 17 andthe mixing valve consist of nipples 32 and coupling nuts 33 and similarconnections are made between these conductors or tubes and the breathercap and overflow pipe with the exception that the nipple 34 connectingwith the cap of the breather tube passes through said cap and is engagedby a nut 35 to retain it connected therewith, a gasket 36 beinginterposed between the nipple and top of the cap to prevent leakage.-The connection between the overow ipe and the tube 17 is in the form ofa T 3 one end of the cross leg being connected with the overiow tube andthe lateral leg being connected with the tube or conductor 17. The crossleg, when in attached position, is disposed vertically, leaving theremote end disposed downwardly and this open end is controlled by a iiapvalve 38 pivoted as at 39 and held in normally closed position by acounterweight 40.

The T 37, when the valve 38 is closed, closes the overflow, but anexcess of steam may be readily discharged since the valve 38 is heldyieidingly in closed position and surplus water may readily flow out ,bydepressing the valve. What steam or moisture is present, however, isrevented from escaping by the valve 38 an on the suction strokes of theengine passes through the conductor 17 to the mixing valve 10. Like`wise, such unburned gases as may be present in the lcrank case are, uponsuch suctionA valve Q7, suchcarbon as may be present being held in astate of suspension' by being 'retained in a sooty condition until it isfinally'- ejected through the exhaust.

Air is admitted `to `the mixing valve for mixture with the moisture andgases` the.A

provision for this consisting of a pair of valves 4l of which the balls42 are spring-- actuated to be yieldingly held lon seats 43 of screws44, these screws having axial ducts 45. lThe proper setti-ng of thescrews will secure the desired compression of the springs to insure the"unseating of -the balls. an'

amount just suiiicient to admit the 'desired amountofair.- I l' Thesetting of the needle valve .27 should be lsuch that the motor may beenabled. to utilize all of the waste gas that it can under full load,for'the amount to be delivered by v the device may be regulated for lessloads than full loads by means of a plug Valve 46 mounted inthe outlet'leg 19 and controlling the duct or channel 28 therethrough.` The plugvalve is actuated from a dash control consisting of a flexible stein 47terminally connected with. anopeiating knob 48, 4Jthe stem being housedin a flexible tubing 49v and terminally supported atv the mixing Valveby a bracket piece 50 into the'eye-ofV which it is inserted and isfrictionally held.

The stem 47 is connected to the valvevby insertion through a'diametrical hole in 4a post- 51, this post being-pivotally mounted on anarm 52 connected with the plug valve.- The stem is retained inconnection with the post by a set-screw 53' engaged in an axial hole inthe free end-of the post and bearing upon the stem.

inea'aeei y The invention having been described, what is claimed as newand useful is: y

l. in combination with an internal combustion motor, a mixing valve incommunication with the intake manifold of the motor, al conductoreffecting Ycommunication between lthe mixing valve and the crank case,

a moisture supply conductor connected with the mixing valve, a valvecarried by the mixing valve and mounted for fixed setting to regulatethe supply from the mixing valve forfull load consumption of the motor,and amanually controlled Valve interposed be- .tween the mixing valve`and the intake manifold for regulating the supply from the mix- 'ingvalve for variation lof load conditions l under full load, the ilastsaid valve having a'l remote control.

- 2. In combination with an internal com.- bustion engine and radiatortherefor, a mixling valve fin communication with the intake manifoldofthe motor, a'conductor-effecting communication between said mixing'valve and the motor crank case, asecond 'conductor effectingcommunication between the mixing valye and the radiator overiiow, valvecontrolled' air inlets for the mixing valve, an adjustable needle valvecontrolling the outlet of the mixing valve,-and ,a yieldingly seatedloutwardly Opening valve conv'trolling'the radiator overiiowat thepointof connection of the conductor therewith.

3. In combination with, an internal comv bustion engine, the.carbii'reton'vacuum tank land radiator therefor, a mixing valve, a

tubular connectionl between the top of the lcarburetor and the vaccumtank, a` T interposed. in said connection, apipe connecting the mixingvalve with said T, tubular connections respectively effectingcommunication between'the mixing valve and the v motor` crank case andsaid valve and the radiator overflow, valve controlled air inlets'forthe mixing valve` and a plurality-ofoutlet controls for the mixingvalve`I one lieing for fixed setting and the other for adjustmentaccording to operating conditions.

ln testimony whereof I aiiix my signature.

FRANK H. ROTH.

